Part A
ADM202EANZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4697 PCS
- Package
- DIP-16
- Series
- Interface - Condutores, Receptores, Transceivers
Replacement verdict
Compatible functional replacement candidate
The ADM202EANZ and ADM208ANZ are both dual-channel RS-232 transceivers from Analog Devices in a 16-lead SOIC package, sharing the same supply voltage range and driver/receiver architecture. The ADM208ANZ provides two additional receivers, so it can serve as a functional substitute for the ADM202EANZ in most designs, provided the extra receiver channels are left unconnected or properly terminated and the board layout accommodates the identical pinout. Designers should verify receiver loading and unused-channel handling before committing to the substitution.
Interface Standard
High match
Supply Voltage Range
High match
Package Type
High match
Channel Count
Validation required
Parts at a glance
Part B
ADM208ANZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3155 PCS
- Package
- DIP-24
- Series
- Interface - Condutores, Receptores, Transceivers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADM202EANZ | ADM208ANZ | Why it matters |
|---|---|---|---|
| Number of Drivers | 2 | 4 | Determines how many independent RS-232 transmit lines the device can drive; a direct functional difference for multi-line interfaces. |
| Number of Receivers | 2 | 4 | Determines how many RS-232 receive lines are supported; affects channel count in the target design. |
| Package / Pin Count | 16-lead SOIC (Narrow) | 24-lead SOIC (Wide) | Footprint and pin count must match the PCB layout; these parts are not drop-in compatible. |
| ESD Protection (RS-232 Pins) | ±15 kV (IEC 1000-4-2, E-model) | ±15 kV (IEC 1000-4-2) | ESD rating affects robustness in harsh environments; both are enhanced-ESD variants but specified under different model designations. |
| Data Rate | 120 kbps | 120 kbps | Maximum signaling rate must meet the application's baud requirement; both support standard low-speed RS-232. |
| Operating Supply Voltage | 5 V (single supply) | 5 V (single supply) | Supply voltage must match the system rail; both operate from a single 5 V supply. |
| On-Chip Charge Pump | Yes (internal) | Yes (internal) | Internal charge pump generates RS-232 voltage levels from a single 5 V rail, eliminating external supplies. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment; both are industrial-grade. |
| Manufacturer | Analog Devices | Analog Devices | Same manufacturer ensures consistent process, documentation, and qualification standards. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADM202EANZ | ADM208ANZ |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Type | Transceiver | Transceiver |
| Protocol | RS232 | RS232 |
| Number of Drivers/Receivers | 2/2 | 4/4 |
| Duplex | Full | Full |
| Receiver Hysteresis | 650 mV | 650 mV |
| Data Rate | 230kbps | 120Kbps |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Through Hole | Through Hole |
Frequently asked questions
What are the key differences between the ADM202EANZ and ADM208ANZ?
The ADM202EANZ is a 2-driver/2-receiver RS-232 transceiver, while the ADM208ANZ is a 4-driver/4-receiver RS-232 transceiver. Both operate from a single +5 V supply and include on-chip charge pump circuitry, but the ADM208ANZ provides twice the number of drivers and receivers for designs requiring additional serial channels.
Are the ADM202EANZ and ADM208ANZ pin-compatible?
No. The ADM202EANZ is supplied in a 16-lead SOIC (N) package, whereas the ADM208ANZ is supplied in a 24-lead SOIC (N) package. The different package sizes and pin counts mean they are not drop-in replacements for one another.
Do both devices meet RS-232 and V.28 specifications?
Yes. Both the ADM202EANZ and ADM208ANZ are designed to comply with EIA/TIA-232-E and CCITT V.28 specifications, and both integrate internal charge pump circuitry to generate the required positive and negative RS-232 voltage levels from a single +5 V supply.
What data rate do the ADM202EANZ and ADM208ANZ support?
Both devices are specified for operation at data rates up to 120 kbps, which is sufficient for standard RS-232 serial communication applications.
Do these transceivers include ESD protection?
Yes. Both the ADM202EANZ and ADM208ANZ are enhanced (E) versions that include ESD protection on the RS-232 input/output pins, making them suitable for applications where ruggedness against electrostatic discharge is required.
How many external charge pump capacitors are required for each device?
Both the ADM202EANZ and ADM208ANZ require four external capacitors for the on-chip charge pump circuitry, consistent with the Analog Devices ADM2xxE family design.
Which device should be selected for a design needing more serial channels?
The ADM208ANZ should be selected when four drivers and four receivers are required, since it provides twice the channel count of the ADM202EANZ. The ADM202EANZ is appropriate for designs needing only two drivers and two receivers, and its smaller 16-lead package may help reduce board space.